Shears for tinners  use



(No Model.) 3 SheetsSheet L J. OHLER.

SHEARS FOR TINNERS USE.

No. 545,131 Patented Aug. 27, 1895.

WITNESSES hW/ENTOl-F M By JAM/7 Ufi/Er.

(mam (No Model.) 3v Sheets-Sheet 2 J. OHLER. SHEARS FOR TINNERS USE.

No. 545,131. Patented Aug. 27,1895.

By Jaw/7 Z7/L7/E/T WITNESSES 3 Sheets-Sheet 3.

(No Model.)

J. OHLER. SHE-ABS. FOR 'TINNERS USE.

Patented Aug. 27,1895.

if /d IN ME N TOR UNITED STATES PATENT OEEre JOHN OI-ILER, OF NEWV ORLEANS, LOUISIANA.

SHEARS FOR TlNNERS USE.

SPECIFICATION forming part of Letters Patent No. 545,131, dated August 27, 1895. Applicati n filed March 26, 1895. Serial No, 543,292. (No model.)

To all whom it may concern.-

Be it known that I, JOHN OHLER, a citizen of the United States, residing at New Orleans, in the parish of Orleans and State of Louisiana, have invented certain new and useful Improvements in Circular or Rotary Shears for Tinners Use; and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to an improvement in circular or rotary shears for tinners use, and its novelty will be fully understood from the following description and claims, when taken in connection with the annexed drawings; and the objects of my invention are to enable a circle to be cut in a sheet of tin without requiring the shears to cut from the edge of the sheet. I attain these objects by the mechanism illustrated in the accompanying drawings, in which- Figure 1 is a top view. Fig. 2 is a side view. Fig. 3 is a vertical cross-sectin of cutter, taken on the line 23 23 of Fig. 1 and looking to the left. Fig. t is a front view of guide when cutter is idle. view of guide during action of cutter. Fig. 6 is a side view of spring.

Similar numerals refer to similar parts throughout the several views.

In the drawings, 1 designates the frame.

2 is a movable frame formed in a horseshoe shape similar to the frame of the Savage cutter invented in 1854. i

3 are clamps for holding a sheet of tin, and are placed so as to retain the sheet in a vertical position and are interchangeable, and are so constructed as to permit large or small clamps to be placed on their respective shafts. The clamp attached to shaft 26 in its action is moved back and forth by means of a lever 6, having a wire 7 attached to one end of same and connected to a pedal (not shown) which extends to the opposite side of the machine, while the clamp on the opposite side is rotated by a crank. (Shown in Figures 1 and 2.)

a is a spring of the construction shown in Fig. 6, having an one end for engaging athumb-screw attached to frame 1, while the opposite end is provided with a fork or an open longitudinal slot, and

Fig. is a front open transverse slot 27 at which permits an easy adjustment of the spring in groove 5 on shaft 26.

8 is a track placed on frame-pieces 1, and upon which frame 2 travels when it is desired to change the position of the clamps relative to the cutters.

9 and 10 are cutter-plates.

11 is a small rotary cutter attached to plates 10.

12 is a large rotary cutter.

13 is a set-screw.

14 14 are two bent-wire springs or holdingarms, one mounted upon each of the cutterplates 9 and 10. These resilient holding-arms extend over the circumference of the rotary cutters 11 and 12 and have their-ends so bent that they willbear against the faces of the said rotary cutters and hold them in position.

15 is a crank which operates the cutter on plate 10 and permits the cutter 11 to cut the sheet of tin at any point at which it may be thrown against the sheet of tin.

16 is a slot in plate 10, in which pin 17, attached to crank 15, moves.

18 is a rod upon which gage-holder 19 travels.

20 is a gage for sheet of tin 2e.

21 is a thnmbscrew.

22 22 is a section-line of Figs. 4 and 5.

23 23 is a section-line of Fig. 3.

25 is a dotted line showing circle of tin out.

In practice the sheet of tin 24 is placed in position in the manner shown in Fig. 1, and to make this adj nstment the lever G is operated by means of the foot pressed on a pedal, (not show.n,) and to which wire 7 is attached.

By this movement the clamp 3 on the shaft 26 is pressed against the sheet of tin 24, and the sheet of tin is held in the clamps, the gage 20 being placed in the position shown in Fig. 5. The crank 15 is then moved from *ou, which causes cutter 11 to be moved against the piece of metal to be cut, and cuts a circle, as shown in Fig. 2,by simply rotating the crank of the clamps. It will thus be seen that it is unnecessary to commence the cut at the edge of the sheet of tin, as is done with some kinds of shears now in use. When the sheet of tin 24 has been cut in the circular shape shown,the residue or remaining portion is removed by simply releasing the pressure of the foot from off the pedal, thus enabling the clamp 3 on shaft 26 to be carried by the spring at in the direction of the frame-piece 1, and at same time releasing the clamp on shaft 26 from its contact to the sheet of tin and causing a separation of the clamps, while the gage 2O resumes the position shown in Fig. t when idle.

An advantage of my invention is its economical construction and saving of time, 1a-

bor, and Waste of material, and enabling me to cut a round blank out of the center of a sheet of metal or sheet-n1etal ring of any required size.

Having described my invention and the manner in which the same is or may be carried into operation, I would say in conclusion that I do not limit myself to the precise details shown in illustration, as the same may be varied to some extent; but

What I claim, and desire to secure by Letters Patent, is-

1. The herein described circular or rotary cutters for tinners use consisting of a cutter plate, a lever having a steel pin thereon working in a slot of the cutter plate, enabling the cutter to be thrown against, and away from a sheet of metal in the manner set forth.

2. The herein described circular or rotary cutters for tinners use, consisting of a cutter plate, a lever having a steel pin thereon Working in the slot of the cutter plate, a gage for regulating the cut, and a gage holder, as set forth.

3. The herein described circular or rotary cutters for tinners use, consisting of a cutter plate, a lever having a steel pin thereon working in the slot of the cutter plate; a gage for regulating the cut; a gage holder; means for adjusting the clamps, and springs for holding the cutters in position, substantially as described.

In testimony whereof I afiix my signature in presence of two witnesses.

JOHN OHLER. Witnesses:

MARTIN FINNERTY, ALPHONSE J. CONNER. 

